Lock



July 24, 1923.

o. c. mxso LOCK Filed March 28. 1922 s Sheets-Sheet 1 July 24,1923. v1,462,828

C. RIXSON LOCK Filed March 28, 1922 5 Shee t's-Sheet 2 lll-llllllll Ipugll awwent-oz 551 elm/W 5 Patented an 2e, iaa.

i: 1 as 7 means PATENT @FFHQCE.

OSCAR C. BKSON, OF NEW ROCHELLE, NEW YORK, ASSIGNOR T T OSCAR C.

RIXSON (30., A CORPORATION OF ILLINOIS.

LOCK.

Application filed March 28, 1922. Serial No. 547,387.

T 0 all whom it may concern-l Be it known that I, OSCAR C. RIxsoN, acitizen of the United States, residing at New Rochelle. in the county ofI'Vestchester and State of New York, have invented certain new anduseful Improvements in Locks, of which the following is a full, clear,and exact description.

In locks as heretofore constructed, it is possible after insertingthe-key to turn it in the wrong direction substantially as far as it isturned in the right direction before engaging the bolt throwing element.Consequently, if one is not sure which way the key should be turned,annoyance and confu sion are apt to result, particularly if the boltdoes not move easily.

An object of my invention is to prevent the possibility of turning thekey the wrong way after inserting it in the lock, and I do this byproviding a movable stop which will project into the path of the key orkeyoperated element, such as a roll-back, on one side or the other ofits initial position ac cording to the position of the bolt, and whichis reversed as to its position by the movement of the bolt.

A convenient construction for this purpose is a rock member pivotedimmediately above the end of the key or roll-back and having two stopelements" on either side of the initial position of the key or roll-backand arranged to be rocked by the movement of the bolt and thereby bringthe two stop elements alternately into the path of the key or roll-back.

While the rock member may be carried either by the bolt or on the case,it willusually be preferable to pivot it on the case and operate it by alug or boss on the bolt which may engage suitable cam faces provided onthe rock member.

It sometimes happens that the bolt is left in a midway positlon,particularly if the mechanism on the inner face of the door foroperating the lock is a hand knob instead of a key. mechanism. In suchan event, it is not possible to give the key a complete rotation, butafter operating the bolt the key must be returned in a reverse directionto its initial position in order to extract the key. To take care ofsuch a contingency and prevent the key or roll-back from becomingtrapped liy the stop which is then in its return path, make the stopyieldable and shaped so that it will be cammed out of the way bythereturn movement of the key or roll-back. In other words, the stop isa positive stop for one rotative direction of the key and is yicldableto permit the key to pass in the other direction.

Another object of my invention is to provide a lock construction whichaffords the greatest protection against unauthorized tampering, and isvirtually burglar-proof. When my invention is embodied in a rim lock,for example, that is, a lock set in or secured against the face of thedoor as distinguished from a mortise lock, and cooperating with asuitable strike on the door jamb, I extend the outer wall of the lockcase so as to cover the strike, and provide a raised part on theextension which is received within a deep recess in the strike, the boltassing through a hole in the wall of the strike and preferably alsoextending into the raised part. In this way the lock case is absolutelyheld against rotating about the strike when the case is unscrewed fromthe door.

Other features of construction which are comprehended within myinvention will appear from the following description of the constructionshown in the accompanying drawings, which is presented for the purposeof illustrating one way in which my invention may be embodied, it beingunderstood that my invention is not limited thereto but only as pointedout in the appended claims: Fig. 1 is a plan view or" the lock with theportion of the door and j'amb shown in section;

Fig. 2 is a sectional elevation of the same on the irregular line 22 ofFig. 1;

Fig. 3 is a transverse section on line 3-3 of Fig. 2;

Fig. 4 is a transverse section through the strike, on line 4-4 of Fig.1;

F Fig. 5 is a sectional plan on line 5-5 of Fig. 6 is an inside view ofthe lock case and contained parts, the cover plate on the inner facebeing removed;

Fig. 7 is a longitudinal sectional elevation of the lock case andcontained parts, on line 7 -7 of Fig. 5;

Fig. 8 is an inner face view of a portion of the cover plate for thelock case;

Fig. 9 is an elevation of one end of the lock case; Y

Figs. 10 and 11 are schematic views, showing the rear end of thelock-bolt and asso ciated parts and illustrating the action of thekey-operated roll-back in different positions;

Fig. 12 is a perspective view of the strike.

The lock construction illustrated is arim dead lock. The lock case 1 issecured by screws 2 against the face of the door 3 in position tocooperate with the pin-tumbler cyl cinder lock 4 disposed in atransverse hole in the door in the usual wa The head or escutcheon ofthe cylinder 18 surrounded by a cylinder ring 5 which bears around theopening against the outer face of the door,

while a cylinder back plate 6 covers the inner end of the openin andbears against that face of the door. crews 7 connect the back plate 6 tothe cylinder which is thereby made adjustable as to its distance fromthe escutcheon 4 to compensate for various thicknesses of doors. Thecase 1 is of the usual rectangular shape and is composed-of bronze orother suitable material and is closed on its inner side by aremovablecover I late 8 secured by screws 9 to suitable lugs integralwith the case. In order to lock the cylinder a ainst rotation, the backplate 6 is provide with two outwardly turned lugs 10 which extend intoholes 11 in the cover plate 8.

On the inner face of the cover plate 8 is a roll-back 12 which isprovided with a hub portion bearing in the cover plate 8. This hubportion has a narrow slot 13, and a flat tongue 14 is carried b theusual eccentric key plug of the cylin er lock and projects through anopening in the back plate 6 into the slot 13. In this way the roll-back12 is caused to rotate by the rotation of the key plug.

On the bottom face of the lock case 1 is another roll-back 15 which hasits axis substantially aligned with that of the roll-back 12 and bearsin the outer wall of the lock case. In the construction shown thisrollback 15 is operated by the hand knob 16, but it will be understoodthat it may be key operated, if desired.

The lock mechanism is of the dead lock type. A bolt mechanism 17 whichis arranged to slide in the lock case, has two locking elements 18 thatproject through the end wall of the lock case when the bolt is thrown,and are withdrawn within the case when the bolt is retracted.

The outer face of the bolt 17 has a lever 19 pivoted thereon near thefront end of the part of the bolt mechanism which is at all timescontained within the case. This lever 19 is of hell crank shape and aspring 20 bears against the short arm and tends to rotate the rear freeend of the long lever arm upward. This free end of the lever arm has astud or lug 21 which projects into a slot in the arm of the roll-back1.5. It is, therefore, apparent that as the roll back 15 is r0- tated,the lever 19 is rotated somewhat on its pivot and the bolt is at thesame time thrown in or out, dependent upon which way the roll-back isrotated. The spring 20 acts to aid the last part of the movement of thebolt and to give a final impulse to it, thereby making the last part ofits movement in both directions sprin actuated.

The under si e of the bolt mechanism 17 has a rectangulardownwardprojection at its rear end in which a square hole 22 is formedand at the top of this square hole on the outer face of the boltmechanism is provided two lugs 23 and 24, the inside upper corners ofwhich are beveled or rounded off, as shown. The lever 19 has on theunder side of its rear end an inward projection 25 which extends intothe hole 22 and bears against the top edge of this hole when the bolt isin locked and unlocked osition.

The stud 21 is in substantial alignment with the pivot axis of the lever19 and the axis of the roll-back 15 when the bolt is thrown, as shown inFigures 6 and 7. The lever and roll-back, therefore, form in effeet atoggle which is substantially on dead center when the bolt is thrown. Inorder to retract the bolt, it is, therefore, necessary to break thistoggle joint and this is done, when the key actuated mechanism isoperated, by engagement of the end of the roll-back 12 with theprojection 25, as indicated by the dotted position of the roll-back inFigure '7.

When the key slot in the cylinder lock is vertical and in osition forthe keyto be inserted or with rawn, the roll-back 12. is in the uprightposition shown in Figure 2. In other words, this is the initial positionof the roll-back 12. When the bolt is retracted, the roll-back 12 isrotated to the right, as shown in Figure 2, to throw the bolt, while itis rotated to the left to unlock or retract the bolt. In order toprevent the turning of the rollback 12 in the wrong direction to operatethe look, a stop mechanism is provided consisting of a semi-circularrock member 26 which is pivoted to a boss 27 on the inside of the casedirectly above the end of the roll-back 12 in the latters initialposition. The lower edge of this rock member 26 has its two ends flangedor bent inwardly to form stop members 28 and 29, the rock member beingcut away between the two stop members. The pivot opening through therock member 26 is slotted in a vertical direction and a spring 30 iscoiled around the pivot of the rock member and has its two ends bearingupon the top of the stop members 28 and 29 and tends to hold the rockmember resiliently with the pivot at the top of the slot.

On the top of the bolt 17 there is formed an upwardly projecting boss 31and the two stop elements 28 and 29 overhang the path of this boss 31 insuch relation thereto that the top surface of the boss engages the'undersurface of the stop elements 28'and 29 successively as the bolt isreciprocated, and the rock member is thereby rocked to bring the stop1elements 28 and 29 alternately into the pat of the roll-back 12 onopposite sides thereof.

In Figure 2, the partsare shown in the position they occupy when thebolt is retracted. The boss 31 is underneath the stop element 29 and hasbrought the stop element 28 into the path of the roll-back 12 on theleft side thereof. lit is, therefore, not possible to turn the roll-back12 toward the left, but it is free to be turned to the right which isthe proper direction to turn it in order to throw the bolt. As theroll-back 12 is turned to the right, it clears the lug 2 1 and engagesthe projection 25 on the lever 19, forcing it down against the tensionof the spring 20 sufliciently to allow the roll-back to pass, and thenengages the inner face of the lug 23. The continued rotation of theroll-back 12 forces-the bolt mechanism to the left and throws the bolt,at the end of which movement the roll-back clears the rounded corner ofthe lug 23. The boss 31 has now engaged the lower cam face of the stopelement 28 and rocked the rock member to its opposite position with thestop element out of the path of the roll-back 12 and the stop element 29in the path of the roll-back, as shown in. Figure 6.. It is nowimpossible to turn the roll-back 12 past itsinitial position toward theright, but it is free to be rotated toward the left to retract the bolt.

It sometimes happens that in operating the knob 16 the bolt is left in amid-position, as indicated in Figure 10. In such case the key operatedroll-back may be rotated to the left to unlock the bolt, but it will notclear the lug '23 and will push against the outer edge thereof inretracting the bolt, finally assuming the position shown in Figure 11,It is now not possible to continue the rotation of the roll-back 12 inthat direction to its initial position in order to extract the key. andsince the boss 31 is in engagement with the cam face of the stop element29, the rock member has been rotated to bring the stop element 28 intothe path of the rollback 12. Unless some provision were made forpermitting the stop element 28 to yield under such conditions, it wouldbe impossible to bring the roll-back 12 back to its initial position topermit of the extraction of the key. It will be noted that the elongatedpivot bearing of the rock member 26 and the spring 30 will permit ofthis necessary yielding. As the key is turned back in a clockwisedirection,

the end of the roll-back 12 will-engage underneath the cam face of thestop element 28 and raise it against the tension of the spring '30,.asindicated'in thedotted position of the 32 when the door is closed. Thisextension 1 is provided on its inner face with a trans versely extendingraised'part or ridge portion' 33, spaced from the end wall of the case 1and perforated at two points in line with the locking elements 18 andadapted to re ceive the ends of these locking elements when the bolt isthrown, as indicated in Figure ti.

The door jamb 34: is rabbeted to receive the strike which is an angularmember having the outer face of its shorter arm recessed to receive theraised portion 33. The wall of this raised portion adjacent the end wallof the case 1 is perforated at two points soas to receive the lockingelements 18. These perforations are preferably somewhat elongated totake care of the relative sag of the door or door frame.

Tt will, therefore, be seen that when the door is closed and the boltthrown into locking position, the locking elements pass through theouter wall of the strike and terminate in the raised part 33. With suchan interlocking construction, it is manifest that the lock isjimmy-proof and that the lock case will not rotate relative to thestrike when the bolt is thrown, even though the screws 2 are removed.Both arms of the strike are provided with screw holes through which thescrews pass for attachment to the door jamb. The screw holes in theinner face of the recessed arm are new ered by the extended outer wall1, as will be noted, and security is thereby provided against thepossibility of removing the screws from the recess of the strike whenthe door is closed and locked. These screws in the recess of the strikeare diposed at an angle, as indicated in Figure 4:, so that the screwsdiverge from each other and thereby hold the strike more securelyagainst inward pressure, such as would be exerted from the outside ofthe door in attempting to pry or force it inward.

In the following claims 1 do not use the term roll-back in any strict orlimited sense, but I wish it understood to include any part immediatelyrotated by the key to actuate the bolt, whether it be integral the key,as in the case of a bitted key, or be a part separate from-the key, asin the construction illustrated.

I claim:

1. A. lock mechanism comprisin a case, a bolt slidable in the case, arollback for actuating the bolt in both directions, and a stop devicemovable into and out of the path of the roll-back by the relativemovementof the bolt and case.

2. A look mechanism comprising a case, a bolt slidable in the case, aroll-back for actuating the bolt in both directions, a rock memberhaving two stop elements adapted to move alternately into and out of thepath of the roll-back as the member is rocked, and means controlled bythe movement of the bolt for actuating the rock member.

3. A look mechanism comprising a case, a bolt slidable in the case, aroll-back for moving the bolt in both directions, a stop device adaptedto be moved alternately into and out of the path of the roll-back onopposite sides of the latters initial position, and means controlled bythe movement 0 the bolt for imparting the said movements alternately tothe stop device as the bolt is mov'ed'to and from locked position,

4. A look mechanism comprising a case, a bolt slidable in the case, aroll-back for actuating the bolt in "both directions, a rock memberhaving two stop elements adapted to move alternately into and out of thepath of the roll-back as the member is rocked, and an actuating elementfor the rock member adapted to engage and actuate the rock member whenthe two are relatively moved, the parts being so related that themovement of the bolt effects said relative movement.

5. A lock mechanism comprising a case, a bolt slidable in the case andhaving a boss thereon, a roll-back for actuating the bolt in bothdirections, and a rock member pivoted tothe case in position to beengaged and actuated by the said boss as the bolt reciprocates, the rockmember having two stop elements adapted to move alternately into and outof the path of the roll-back on opposite sides of the latters initialposition as the said member is rocked.

6. A look mechanism comprising a case, a bolt slidable in the case, 'aroll back for actuating the bolt in both directions, a pivoted rockmember havin two spaced stop elements each provide with a cam face andadapted to move alternately into and out of the path of the roll-back asthe member. is rocked. and an actuating element for the rock memberadapted to engage the said cam faces successively and rock the saidmember as the said member and actuating element are relativelyreciprocated, one of the two relatively reciprocable parts being carriedby the bolt and the other by the case.

7. A look mechanism comprising a case, a bolt slidable in the case andhaving a boss thereon, a roll-back for actuating the bolt in bothdirections, and a rock member pivoted to the case and having two spacedstop elements each provided with a cam face and adapted to movealternately into and out of meaeae the path of the roll-back on oppositesides of the latters initial position, the cam faces being so related tothe said boss as to be enga d successively thereby and rock the rocmember as the bolt re'ciprocates.

8. A look mechanism comprising a case, a bolt slidable in the case, aroll-back for actuating the bolt in both directions, a movable stopdevice having a cam face and a stop face, and means for resilientlyholding the stop device in a position with its cam face crossing thepath of movement of the rollback at one point and the stop face crossingsaid path at another point.

'9. A look mechanism comprising a case, a bolt slidable in the case, aroll-back for actuating the bolt in both directions, a pivoted f rockmember having the pivot bearing elongated to permit movement of thepivot oint toward and from the axis of the rollack, resilient meansyieldingly holding the rock member in its position nearest the axis ofthe roll-back,'the rock member having two spaced stop elements eachprovided with a cam face and a stop face and adapted to move as themember is rocked alternately into and out of a position with the cameface crossing the path of movement of the rollback at one point and thestop face crossing said path t another point, and an actuating elementfor the rock member adapted to engage the said cam faces succemively androck the said member as the said member and actuating element arerelativel reciprocated, one of the two relatively reciprocable partsbeing carried by the bolt and the other by the case.

10. A lock mechanism comprising a case, a bolt slidable in the case andhaving a boss thereon, a roll-back for actuating the bolt in bothdirections, a rock member pivoted to the case on an elongated bearingand having two spaced stop elements each provided with a stop face and acam face and adapted to move as the member is rocked alternately intoand out of a position with the cam face crossing the path of movement ofthe rollback at one point and the stop face crossing said face atanother point, and means for resiliently holding the rock member on itspivot in its position nearest the axis of the roll-back, the boss on thebolt being positioned to engage the cam faces successively and rock therock member as the bolt reciprocates.

11. A lock mechanism comprising a locking member movable to and fromlooking ltd aeeaaaa in both directions, and a reversible stop deviceoperative to prevent movement of the actuating means in the wrongdirection from the initial position and arranged to be reversed by themovement of the actuating means.

13. A look mechanism comprising a case a bolt slidable in the'case,operating means for actuating the bolt in both directions, and a stopdevice for opposing the turning of the operating means in one direction,said stop being movable out of opposing position by the movement of theoperating means in the opposite direction.

14. A look comprising a lock case adapted to be secured to the face of adoor, a bolt slidable in said case and arranged to protrude from one endthereof in locked position, the outer wall of the case having anextension at the bolt protruding end, a raised part on the inner face ofthe extension spaced from the end wall of the case and having'a holetherein to receive the bolt in locked position, and a strike having arectangular head adapted to be set into a rectangu'lar cut in the trimand recessed to receive the raised part on said extension when the dooris closed, the wall of the recess adjacent the end of the case having ahole adapted to receive the bolt when in locked position and the otherthree walls of the head serving to cover the raw cuts in the door trim.

15. In a lock comprising a lock case adapted to be secured to the faceof a door,

a bolt slidable in said case and arranged to protrude from one endthereof in locked position, the outer wall of the case having anextension at the bolt protruding end, a

raised part on the inner face of the extentangular head adapted to beset into a rectangular cut in the tri'n and recessed to receive theraised part on said extension when the door is closed, the wall of therecess adjacent the end of the case havin a hole adapted to receive thebolt when in locked position and the other three walls of the headserving to cover the raw cuts in the door trim and the bottom wallof therecess being provided with holes for screws to attach the strike to thedoor jamb, said recess being covered by the extended outer wall of thelock case when the door is closed.

16. A look comprising a lock case adapted to be secured to the face of adoor, a bolt slidable in said ease and arranged to protrude from one endthereof in locked position, the outer Wall of the case having an ex-'tension at the bolt protruding end, araised part on the inner face ofthe extension spaced from the end wall of the case and havin a holetherein to receivethe bolt in looked position, and a strike having arectangular head adapted to be set into a rectangular cut in the trimand recessed to receive the raised part on said extension when the dooris closed, the wall of the recess adjacent the end of the case having ahole adapted to receive the, bolt when in locked position and the otherthree walls of the head serving to cover the raw cuts in the door trimand the bottom wall of the recess being provided with two angularlydisposed diverging screw holes.

17. A look mechanism comprising a case, a bolt slidable in said case, apivoted lever on said bolt, a rotative roll-back having an arm thereon,and a pivotal connection between the free end of the lever and said arm,the parts being so designed that the pivotal connection is insubstantial alignment with the axes of the pivot and of the roll-backwhen the bolt is 1n locked position.

18. A lock mechanism comprising a case, a bolt slidable in said case, apivoted lever on said bolt, a rotative roll-back having an arm thereon,a pivotal connection between the free end of the lever and said arm, theparts being so designed that the pivotal connection is in substantialalignment with the axes of the pivot and of the roll-back when the boltis in locked position and resilient means tending to move the saidivotal connection toward the horizontal p ane of the axis of theroll-back.

'19. A lock mechanism comprising a cylinder lock adapted to be disposedin a transverse opening in a door and including a plate adapted to beclamped over the opening against the inner face of the door and havingtwo outwardl projecting lugs, and a 100 case arrange to be secured onthe inner face of the door over the said plate and in operative relationto the cylinder lock, the inner wall of the case being provided with twoholes arranged to receive the 111 on said plate, whereby the cylinderlock is held against rotation.

In witnes whereof I hereunto subscrfpe my signature.

USU C. RIXSON.

